Primer-retainer for dynamite-cartridges.



H. COMSTOCK. PRIMER RETAINER FOR DYNAMITE CARTRIDGES.

APPLICATION FILED FEB. 6, l9l7 Patented June 19, 1917.

z To whoa, z't'may concern.'

citizen of the saATEs PATENT OFFICE Hanny concsrocn, or MINEVILLE, NnW'YonKr 'Be it known that I, HARRY Comsrocx, a

Mineville county of Essex, and yState of New York, have invented 'certain new and' useful; Improvements in `Primer,-Retainers' for ynamite-'Cartridges, of which the following is'l av specication.

,Thisinvention relates to 'those devicesd'e-v signed-.for'retainng the primer and fuse 111,'

a dynamite 'cartridge to 'prevent' accidental detachment of the fuse and primer cap or detonater from the cartridge.4 t Various' devices have been proposed for iging or securing the fuse to the cartrldge. ne'v method is the insertion of the cap on theendof` the fuse into an opening leading the dynamite 'within the shell and tying 1n a 'general lateral or inclined l'relation inlto t e fuse to the shell. This method has the disadyantage'of the fuse lying' along the outthe patent 4 1097442, May 19, 1914, whereina retaining cord is' inserted in th side of the cartridge and incontact with the'sideof the hole; the string or cord is liablev to; slip ,1 oil; the diameter of. the hole, it may become 'lodged crosswise 4thereoi? and if the cartrid e is tamped hard in this positi'on, it is liab e to explode. to slip off renders the cap .liable to pull out of the cartridge and the tam ing may break the cap orucause it to explo e.

Another method heretofore proposed isto unfold one end of the paper-shell and to insert the .cap into a hole made lengthwise of the dynamite.' -The opened end of the shell is then tied\around the fuse by a cord. Thisl method possesses the objection that the vcap is easily pulled from the cartridge. The' paper shell of a dynamite cartridge .1s paraflined to render it .'waterproof; consequently, -no matterl how tight the cord may be drawn the fuse readily pulls through the neck of paper at'th'e end ofthe shell. While this method placesl the primer or cap in the propervposition in the cartridge, the method of anchoring ris unstable 'and therefore unsafe. Another to vWilllam W T ones Number e dynamite and provided with an' ad]ustab1e device to engage United. States, residing atif the capv is longer than ,The tendency of the tying cord.

plan proposed is that set forth in Specification of Letters .'Patent. Patented J une 19', 1917, Application mea Februari e', 1917. serial in. 146,966.

' the fuse. ,The cap in that: constructioneis i inserted from the top or end of the cartrid e.

While that device 'satisfactorily anchors t 'e fuse and cap, the very great expense of pl: c-

i ing this anchor in the dynamite and the incident increase in .the cost of-the cartridge is very objectionable and appears to be im-l practical to' apply the J ones'anchoring device in cartridges which are automatically made in large numbers on machines, the

practice which lcommonly vprevails at the present day. Such machines` introduce dynamite into a Jlarge number of paper shells simultaneously and afterward close the open .A

ends ofthe shells. The introduction of the anchor of the Jones patent has to occur when the dynamite is being .packed into the shell, a difficult and expensive'operation.

To obviate the disadvantages inhering in 'have provided an improved primer and fuse fuse to hold it and the cap firmly anchored l the methods and devices above set forth, I

to the cartridge. In' my invention the cap p and end of the fuse lare .introduced into an opening extending inwardly from the end of the cartridge, which is the safest position for both cap and fuse. i

Within the paper shell, as distinguished-1Q -frombeing located within the dynamite, ,I

provide one or more, preferably two,'cords which are adapted to be tied to' the fuse lafter the cap has been entered in an opening in the dynamite cartridge. The cords' may .be embodied as a part of the paper shell 'during its formation or they may be in` serted inside the paper shell after the latter is complete and before it is filled withadynamite. Dynamite shells are usuallyformed on spiral wind machines. While the mariner of inserting the cords does not enter into the present invention, I may say that they can be 'arran ed to beformed or laid along the shell during its manufacture 'so that they will extend, lengthwise thereof withl ytheir ends freely protruding beyond the ends of the shell at the'linesof `the end folds. If

the cords are placed in the shell after the llatter has been formedthey may be connected thereto by adhesive or 1n any other manner. At one end of the shell the-ends of the cords are tied"together land at the other end they are tied to the fuse after the cap has been introduced into the dynamlte and the open end of the shell folded down. A secure anchorage of-the fuse and cap is thus provided and there is no. possibility of the cap being injured or exploded or'the fuse abrad d.

I am aware that my invention is susceptible of modification` without departin .from the principle thereof, Jand the embo lment thereof hereinaf er described and shown in the accompanying drawings is to be consldered as illustrative, ratherthan restrictive, of the scope of the invention.

In the drawings Figure 1 is a perspective of the complete cartridge, ready for priming;

Fig. 2 a vertical section, partly 1n 'elevation, 'showing the cap and and fuse inserted in the dynamite, the cords tied at one end of the shell and the remaining end of the shell open; and

Fig. 3 a detail perspective of the upper id of the shell, the cords being tied tothe The paper shell or cartridge 1 may be formed in any manner, but such shells are usually made on the spiral wind tube machine and afterward one of the ends is folded as-at 2. The shell is then grouped with others and the dynamite packed into the shell. Subsequently, the previously open end is folded as at 3. The complete dynamite cartridge is supplied-to the trade' and when the cartridges are to be used, a section of fuse of the desired length lis cut and 1then follows.

well known methods or devices form l anchoring the cap a'nd fuse have their'drawthe cap containingfulminateof mercury or other high explosive is crimped, by a suitable tool, onl the end of the fuse. The securement of the cap and. fuse to the. cartridge As previously explained, earlier backs In 'carrym' out my inventionI rovide the paper shll 1 with cords 4 whoIsie ends 5, 5a project'freely from the folded ends 2 and ofthe cartridge as the latteris delivered-tothe user. The cords lv are applied it has been Afinished, by securingthese cords 'to the shell in any desired manner, as, for

instance, by a suitable adhesive. 4 The cords are applied to the shell before the dynamite 6 is packed into the shell. The anchoring 'of the fuse does not depend on the location of the cdrds within the body of the dynamite. 6, but, on the contrary, the shell 1 is pro/ vided with the cordsand the dynamite there- 7 before, or after, t

after packed into th`shell. If desired, the loose cord ends 5* m y be tied together as at offand a cap '9 is crimped on to theen Y 1f either when it is being made,l` Yor wound, orto the inside of the shell after a free e shell is lilledwithtli'e will be in that condition when the cartridge is delivered to the user. If desired, however, the loose ends of the cords may remain that way and tied as at 7 'by the user.-

enthe cartridge is to be used, a section of fuse 8 of the desired length is cu;

o the fuse in the usual manner. A hole'is then made lengthwise of the dynamite 6 and the cap 4and fuse entered therein as shown in Fig.. 2. If desired,the :folded end 3 may be opened out before this operation. After the cap and fuse have been mserted, the ends 5 rof the cords 4: are tied to the fuse at 10.

The fuseand cap yare thus securely anchored,

*by the cords 4c. A

cartridge which hasbeen primed inthe manner set forth may be tamped into the blast hole without danger of accidental discharge if ordinary precautions are observed, and. there is little likelihood -of the se. 2. A shell or cartridgefor containing d-yvnamite or other explosive'which is provided J100 'with aLVplurality of cords or flexible devices adapted to be secured together` across a closed 7'end of the shelland at the other end'- thereof' to be fastened to the fuse after the shell has been loaded' and primed, to thereby zirzlnehor 4the loaded and primed shell to its se. 1 3.A primed dynamite cartridge or'shell, comprising the shell, theexplosive conta-ined therein, a cap or primer embedded in the' ex-4 plosive and provided with afuse, and cords carriedby the shell'proper'whichl 'are secured together-across a closed end' of the shell and at the other-end of the shell have their ends tied to the fuse. i. A

4. As a newarticle of manufacture, a paper shell or cartridge adapted to be directly loaded: with an explosive, having cord or the like permanently attached to the inne urface of the shell, and provided with lwlprtion adapted, on subsequent loadmgoft e shell, to Abe secured to the fuse.

5.' s a new artidle of manufacture, a7,

paper shell or t'sartridgey adapted-'to be die rectly loaded with an explosive, having a tothe cartridge as they are'rmly retained A,said cord having an end portion tied to the iasv the shell and pemmently attached thereto, .its

provided.` with. lfree tying portions at opposite ends for the purpos'eof anchoring th@ andgprime.

F6, As 4a 'new article of manufacture, a papershell" or cartridge adaptedto be directly loaded with an explosive, having a air of cords orthe like extending the full ength of theshell and permanentlyattached thereto, said cords being provided with free tyingportions at their oppositel ends, one

pair of'ltyingportionsbeing adapted 4to he' secured together across the end .of the shell,

' the other pair of tying portions being adapt- 10 ed for Seoul-ement to the fuse.

In testimony-whereof, I hereunto aiix my I signature.

' HARRY COMSTOCK. 

